Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e1abe8cdfcf224…

MALICIOUS

PDF

76.1 KB Created: 2021-03-15 09:16:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 959d8c2d884f2658e6e5f72ccbbf72e2 SHA-1: ca3d87f8a3e0be89597e00696fbc1afa593f58fc SHA-256: f5e1abe8cdfcf22476e70bcfad6ae5a2c51db0d57a78ba34e22b01ebde264d72
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF acts as a link farm, containing numerous URLs pointing to disposable domains, with a primary URL being https://maypoin.ru/strik?utm_term=sons+and+lovers+sparknotes. This structure suggests the document is designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/strik?utm_term=sons+and+lovers+sparknotes PDF link annotation
    • http://lisolu.org/98738311994qtteh.pdfIn PDF document text
    • http://garantiya62.ru/475298508829fk1i.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/93956197725.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/all_both_neither_none_exercises.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/12335710139.pdfIn PDF document text
    • http://jobs-ingenieur.best/xilosekukibajikekabif5xe3p.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/mokexazom.pdfIn PDF document text
    • http://fiteduwad.22web.org/63139140629.pdfIn PDF document text
    • http://radanews.site/47300801518p9hid.pdfIn PDF document text
    • http://dektesheff.xyz/2002_vw_jetta_2.0_transmission_fluid_typeaxl3e.pdfIn PDF document text
    • http://llloooodddd.space/23064752501ivbim.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/difference_between_margin_of_safety_and_factor_of_safety.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/70007320247.pdfIn PDF document text
    • http://usejus.club/massey_ferguson_165_parts_diagram6jibi.pdfIn PDF document text
    • http://youralteragoods.com/samuel_beckett_waiting_for_godot_meaningugiuk.pdfIn PDF document text
    • http://vowazokisexe.22web.org/91813986316.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/carbs_in_taco_bell_soft_taco_no_shell.pdfIn PDF document text
    • http://delayikapy.xyz/infected_ear_cartilage_piercing_antibiotics2o3v4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuniguvip.epizy.com/87847001334.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/power_book_2_ghost_season_2_cast.pdfIn PDF document text
    • http://lukafimagog.atwebpages.com/archie_comics_sabrina_the_teenage_witch.pdfIn PDF document text
    • http://dadagax.epizy.com/melix.pdfIn PDF document text
    • http://zisoramemib.rf.gd/55195290069.pdfIn PDF document text
    • http://palexibibiw.atwebpages.com/senior_system_administrator_job_description.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 5180 bytes
SHA-256: c36a16b27a9252f2f427a85fe7bfdadd8a3b7f975dc41b7c1109325b0960ed16
font_01_sfnt_off00010002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10002 10292 bytes
SHA-256: 2358d36830dad4fcb2ce01b78bd71c53c365ebdc3a9641868e0716e519a7f566

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